Attempting to upgrade a box running Ubuntu Lucid to Precise, failed. "E: Could not perform immediate configuration on 'python-minimal'. Please see man 5 apt.conf under APT::Immediate-Configure for details" Oh, great. Workaround so far has required manually running dpkg to install .deb files from /var/cache/apt/archives, recursing down the dependency chain one by one. Way to go Canonical. Release quality. The same people that wouldn't ship Evolution 3.4 with the rest of GNOME 3.4 because it "wasn't ready yet".